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Only member of the cod family that lives in
freshwater. |
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Circumarctic distribution in freshwater. |
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Are crepuscular and largely nocturnal. |
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Live in deep lakes and larger rivers with slow
currents. |
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Usually associated with bottom cover like large
rocks, dense vegetation, and crevices. |
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Move into shallow water at night to feed. |
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Feed on invertebrates, and mollusks when small
and add fish to the diet as they get older. |
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Common names:
freshwater cod, freshwater eel, eelpout, ling, lota, lush, and
lawyer. |
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From 1996-2000, we examined stomach contents
from 409 burbot. |
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324 (79%) contained food items and 85 (21%) were
void. |
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Overall, burbot averaged 3.96 prey fish /
stomach. |
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Those with food averaged 5.00 prey fish /
stomach. |
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Species found in burbot stomachs included:
rainbow smelt, slimy sculpin, alewife, crayfish, nine-spine stickleback,
deepwater sculpin, zebra mussels, three-spine stickleback, trout perch,
johnny darter, round goby, yellow perch, spottail shiner, may flies,
terrestrial insects, and unidentified fish remains. |
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Numerical % Composition |
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Smelt 36.9% |
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UFR 16.9% |
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Sculpin 10.4% |
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Alewife 7.2% |
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Crayfish 6.3% |
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Sticklebacks 6.3% |
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All
other spp. <1% |
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Mass
% Composition |
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Smelt 22.2% |
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Alewife 21.3% |
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UFR 13.3% |
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Sculpin 12.8% |
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Crayfish 12.1% |
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Sticklebacks 6.1% |
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All
other spp. <1% |
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We examined 471 burbot for lamprey marks from
1996 to 2000 |
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Sea lamprey wounding rates were low, averaging
0.8 marks / 100 fish |
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There were no obvious wounding trends with size
of burbot or with location in the lake |
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Notes